Annotation of sys/arch/i386/isa/lms.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: lms.c,v 1.20 2007/04/10 22:37:17 miod Exp $ */
! 2: /* $NetBSD: lms.c,v 1.38 2000/01/08 02:57:25 takemura Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1993, 1994 Charles M. Hannum.
! 6: * Copyright (c) 1992, 1993 Erik Forsberg.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
! 16: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 17: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
! 18: * NO EVENT SHALL I BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
! 19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
! 21: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
! 22: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
! 23: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
! 24: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #include <sys/param.h>
! 28: #include <sys/systm.h>
! 29: #include <sys/ioctl.h>
! 30: #include <sys/device.h>
! 31:
! 32: #include <machine/bus.h>
! 33: #include <machine/intr.h>
! 34:
! 35: #include <dev/isa/isavar.h>
! 36:
! 37: #include <dev/wscons/wsconsio.h>
! 38: #include <dev/wscons/wsmousevar.h>
! 39:
! 40: #define LMS_DATA 0 /* offset for data port, read-only */
! 41: #define LMS_SIGN 1 /* offset for signature port, read-write */
! 42: #define LMS_INTR 2 /* offset for interrupt port, read-only */
! 43: #define LMS_CNTRL 2 /* offset for control port, write-only */
! 44: #define LMS_CONFIG 3 /* for configuration port, read-write */
! 45: #define LMS_NPORTS 4
! 46:
! 47: struct lms_softc { /* driver status information */
! 48: struct device sc_dev;
! 49: void *sc_ih;
! 50:
! 51: bus_space_tag_t sc_iot; /* bus i/o space identifier */
! 52: bus_space_handle_t sc_ioh; /* bus i/o handle */
! 53:
! 54: int sc_enabled; /* device is open */
! 55: int oldbuttons; /* mouse button status */
! 56:
! 57: struct device *sc_wsmousedev;
! 58: };
! 59:
! 60: int lmsprobe(struct device *, void *, void *);
! 61: void lmsattach(struct device *, struct device *, void *);
! 62: int lmsintr(void *);
! 63:
! 64: struct cfattach lms_ca = {
! 65: sizeof(struct lms_softc), lmsprobe, lmsattach
! 66: };
! 67:
! 68: int lms_enable(void *);
! 69: int lms_ioctl(void *, u_long, caddr_t, int, struct proc *);
! 70: void lms_disable(void *);
! 71:
! 72: const struct wsmouse_accessops lms_accessops = {
! 73: lms_enable,
! 74: lms_ioctl,
! 75: lms_disable,
! 76: };
! 77:
! 78: int
! 79: lmsprobe(struct device *parent, void *match, void *aux)
! 80: {
! 81: struct isa_attach_args *ia = aux;
! 82: bus_space_tag_t iot = ia->ia_iot;
! 83: bus_space_handle_t ioh;
! 84: int rv;
! 85:
! 86: /* Disallow wildcarded i/o base. */
! 87: if (ia->ia_iobase == IOBASEUNK)
! 88: return 0;
! 89:
! 90: /* Map the i/o space. */
! 91: if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh))
! 92: return 0;
! 93:
! 94: rv = 0;
! 95:
! 96: /* Configure and check for port present. */
! 97: bus_space_write_1(iot, ioh, LMS_CONFIG, 0x91);
! 98: delay(10);
! 99: bus_space_write_1(iot, ioh, LMS_SIGN, 0x0c);
! 100: delay(10);
! 101: if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x0c)
! 102: goto out;
! 103: bus_space_write_1(iot, ioh, LMS_SIGN, 0x50);
! 104: delay(10);
! 105: if (bus_space_read_1(iot, ioh, LMS_SIGN) != 0x50)
! 106: goto out;
! 107:
! 108: /* Disable interrupts. */
! 109: bus_space_write_1(iot, ioh, LMS_CNTRL, 0x10);
! 110:
! 111: rv = 1;
! 112: ia->ia_iosize = LMS_NPORTS;
! 113: ia->ia_msize = 0;
! 114:
! 115: out:
! 116: bus_space_unmap(iot, ioh, LMS_NPORTS);
! 117: return rv;
! 118: }
! 119:
! 120: void
! 121: lmsattach(struct device *parent, struct device *self, void *aux)
! 122: {
! 123: struct lms_softc *sc = (void *)self;
! 124: struct isa_attach_args *ia = aux;
! 125: bus_space_tag_t iot = ia->ia_iot;
! 126: bus_space_handle_t ioh;
! 127: struct wsmousedev_attach_args a;
! 128:
! 129: printf("\n");
! 130:
! 131: if (bus_space_map(iot, ia->ia_iobase, LMS_NPORTS, 0, &ioh)) {
! 132: printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
! 133: return;
! 134: }
! 135:
! 136: /* Other initialization was done by lmsprobe. */
! 137: sc->sc_iot = iot;
! 138: sc->sc_ioh = ioh;
! 139: sc->sc_enabled = 0;
! 140:
! 141: sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_PULSE,
! 142: IPL_TTY, lmsintr, sc, sc->sc_dev.dv_xname);
! 143:
! 144: a.accessops = &lms_accessops;
! 145: a.accesscookie = sc;
! 146:
! 147: /*
! 148: * Attach the wsmouse, saving a handle to it.
! 149: * Note that we don't need to check this pointer against NULL
! 150: * here or in psmintr, because if this fails lms_enable() will
! 151: * never be called, so lmsintr() will never be called.
! 152: */
! 153: sc->sc_wsmousedev = config_found(self, &a, wsmousedevprint);
! 154: }
! 155:
! 156: int
! 157: lms_enable(void *v)
! 158: {
! 159: struct lms_softc *sc = v;
! 160:
! 161: if (sc->sc_enabled)
! 162: return EBUSY;
! 163:
! 164: sc->sc_enabled = 1;
! 165: sc->oldbuttons = 0;
! 166:
! 167: /* Enable interrupts. */
! 168: bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0);
! 169:
! 170: return 0;
! 171: }
! 172:
! 173: void
! 174: lms_disable(void *v)
! 175: {
! 176: struct lms_softc *sc = v;
! 177:
! 178: /* Disable interrupts. */
! 179: bus_space_write_1(sc->sc_iot, sc->sc_ioh, LMS_CNTRL, 0x10);
! 180:
! 181: sc->sc_enabled = 0;
! 182: }
! 183:
! 184: int
! 185: lms_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
! 186: {
! 187: #if 0
! 188: struct lms_softc *sc = v;
! 189: #endif
! 190:
! 191: switch (cmd) {
! 192: case WSMOUSEIO_GTYPE:
! 193: *(u_int *)data = WSMOUSE_TYPE_LMS;
! 194: return (0);
! 195: }
! 196: return (-1);
! 197: }
! 198:
! 199: int
! 200: lmsintr(void *arg)
! 201: {
! 202: struct lms_softc *sc = arg;
! 203: bus_space_tag_t iot = sc->sc_iot;
! 204: bus_space_handle_t ioh = sc->sc_ioh;
! 205: u_char hi, lo;
! 206: signed char dx, dy;
! 207: u_int buttons;
! 208: int changed;
! 209:
! 210: if (!sc->sc_enabled)
! 211: /* Interrupts are not expected. */
! 212: return 0;
! 213:
! 214: bus_space_write_1(iot, ioh, LMS_CNTRL, 0xab);
! 215: hi = bus_space_read_1(iot, ioh, LMS_DATA);
! 216: bus_space_write_1(iot, ioh, LMS_CNTRL, 0x90);
! 217: lo = bus_space_read_1(iot, ioh, LMS_DATA);
! 218: dx = ((hi & 0x0f) << 4) | (lo & 0x0f);
! 219: /* Bounding at -127 avoids a bug in XFree86. */
! 220: dx = (dx == -128) ? -127 : dx;
! 221:
! 222: bus_space_write_1(iot, ioh, LMS_CNTRL, 0xf0);
! 223: hi = bus_space_read_1(iot, ioh, LMS_DATA);
! 224: bus_space_write_1(iot, ioh, LMS_CNTRL, 0xd0);
! 225: lo = bus_space_read_1(iot, ioh, LMS_DATA);
! 226: dy = ((hi & 0x0f) << 4) | (lo & 0x0f);
! 227: dy = (dy == -128) ? 127 : -dy;
! 228:
! 229: bus_space_write_1(iot, ioh, LMS_CNTRL, 0);
! 230:
! 231: buttons = ((hi & 0x80) ? 0 : 0x1) |
! 232: ((hi & 0x40) ? 0 : 0x2) |
! 233: ((hi & 0x20) ? 0 : 0x4);
! 234: changed = (buttons ^ sc->oldbuttons);
! 235: sc->oldbuttons = buttons;
! 236:
! 237: if (dx || dy || changed)
! 238: wsmouse_input(sc->sc_wsmousedev,
! 239: buttons, dx, dy, 0, 0, WSMOUSE_INPUT_DELTA);
! 240:
! 241: return -1;
! 242: }
! 243:
! 244: struct cfdriver lms_cd = {
! 245: NULL, "lms", DV_DULL
! 246: };
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